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A Revision of the Variable Period of IM Aquilae


Dana Lehr

Maria Mitchell Observatory

Nantucket, MA 02554,



Received: August 7, 1991




Previously published elements for the RR Lyrae variable IM Aquilae are revised with the addition of observations from the Maria Mitchell Observatory plate collection from 1981 through 1990.  The following parabolic elements provide a good approximation of the decreasing period: JD_max = 2439806.597 + 0.45694896 E - 1.91 x 10^-10 E^2.


Link to ADS abstract, article and citation information

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